// message
.show_msg{
  width:100%;
  height:1.6rem;
  text-align:center;
  position:fixed;
  left: 0;
  z-index: 999;
}
.show_span{
  display: inline-block;
  height: 1.6rem;
  padding: 0 1rem;
  line-height: 1.6rem;
  background:rgba(0,0,0,0.8);
  border-radius: .8rem;
  color: #fff;
  font-size: 22/32rem;
}